12115553112 has 96 divisors (see below), whose sum is σ = 35615623680. Its totient is φ = 3698472960.

The previous prime is 12115553069. The next prime is 12115553123. The reversal of 12115553112 is 21135551121.

It is a happy number.

12115553112 is a `hidden beast` number, since 1 + 2 + 115 + 5 + 531 + 12 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67912 + ... + 169832.

It is an arithmetic number, because the mean of its divisors is an integer number (370996080).

Almost surely, 2^12115553112 is an apocalyptic number.

12115553112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12115553112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17807811840).

12115553112 is an abundant number, since it is smaller than the sum of its proper divisors (23500070568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12115553112 is a wasteful number, since it uses less digits than its factorization.

12115553112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102073 (or 102066 counting only the distinct ones).

The product of its digits is 1500, while the sum is 27.

The spelling of 12115553112 in words is "twelve billion, one hundred fifteen million, five hundred fifty-three thousand, one hundred twelve".